时间包常量而不是数字

Question

is it possible to use constants instead of digits in Format func

time.Unix(1392899576, 0).Format(stdLongYear +"/"+ stdZeroMonth +"/"+ stdZeroDay)

instead of

time.Unix(1392899576, 0).Format("2006/01/02")

Answer 1

No you cant. Those constant start with a lower case letter and thus are not exported.

the only way to mimic that package is to either copy it or to re-create the constants in your own package like below:

package main

import (
    "fmt"
    "time"
)

const (
    stdLongYear  = "2006"
    stdZeroMonth = "01"
    stdZeroDay   = "02"
)

func main() {
    fmt.Println(time.Unix(1392899576, 0).Format(stdLongYear + "/" + stdZeroMonth + "/" + stdZeroDay))
}

http://play.golang.org/p/wTwMLbheCM